gordon



c..s. GORDON. I PYRO METER SWITCH.

APPLICATION HLED JUNE 15. 19H}- 1,32O,544. Patented Nov. 4, 1919.

2 8HEETS-SHEET l.

c. s. GORDON.

PYROMETER SWITCH.

APPLICATION HLED JUNE 16, mo.

1,326,544. I Patented Nov. 4,1919.

2 SHEETS-SHEET 2.

. AZWL w y /yw 4 necting three thermocouples to the galvanometer. The contacts are in the form of spring fingers 20, 21, supported on an insulating block 22 and insulated from other in a suitable manner. The contact is made by forcing the spring member 20 downward into engagement with the fin 'er 21 by the action of one, of the buttons 17, i 18, 19, the contact of' the lower spherical end 23 of the button or plunger being against an insulating st'ri 24 on the top oi the member 20. Whi e I have referred to the switch as consisting of members 20, 21, it will be understood from the showing that as a practical proposition I provide two of each of said members 20, 21, and that the insu- .lating strip 2 L bridges the two strips 20. However, the efiect is the same as it only one pair of spring fingers 20, 21, were employed. Mounted in the casing 15 is a transverse shaft 25, to which a plurality of hook members 26 are. keyed, one of said members being provided for each switch unit. The hook portion of the member 26 has an inclined upper face 27, the square under face of the hook engaging a metallic wear strip 28, which lies on top of the insulatingstrip 24. A spring 29, connected to one or more of the members 26, tends to hold the same in the position shown in Fig. 2. The action is asfollows: Assuming the parts in the position shown in the drawings and that it'is desired to connect up a switch which is controlled by the buttonl8, such button is depressed, the end of the switch members contacting the inclined portion 27 of the hook member and Oscillating the same as well as all the other hook members, against the tension of the spring 29. As the button is depressed the switch unit controlled by the button 17 is released, because the hook member which holds the same is forced outwardly to a releasing position. The result is that the contacts are broken and remade at practically the same instant. Thus it will be seen that upon pressing any oi the buttons, any other buttons which are in a depressed condition are released.

Obviously many expedients may be cmployed for securing the same results and. modifications which are within the scope oi? my claims I consider within the spirit of my invention, 4

I claim:

1. In a device "ri the class described, in combination, a casing, an insulated suppor in said casing, a plurality of sets of spring members secured to said support, said mean bers acting as contacts, means extendin through the casin for actuating any set or said spring memiers, a movable member mounted in said casing, a plurality of members secured to said movable member, one of said members being provided for every set' of said spring members, and portions of said members being arranged whereby to retain said spring members in contact when in one position and to release said contacting members when another set is moved into contacting position.

2. In a device of the class described, the combination of a casing, an insulated sup port in said casing, a plurality of pairs of spring fingers secured to said insulating support, said fingers acting as contacts, a

plurality of buttons projcctingthrough said casing, one button being provided for each pair of spring fingers, a shaft mounted in .said "using, a plurality of hooks keyed to said shaft, one hook being provided for each pair of spring fingers, the upper portion of said hook members being inclined or bev eled, said inclined portion iuiderlying the end of one of said springfingers and the end oi ,said spring finger being adapted to underlie the hook when said finger is in de pressed or contacted position, the arrangement being such that any of said lingers held in depressed position by said hooks is released upon the depression of any other spring lingers, substantially as described.

Signed at Chicago, Illinois, this 12th day of June, 1916.

CLAUD S. GORDON. lVitnesses H. S. SYL ssTnn.

J. WHITE. 

